Removal of Nitrogen Oxides from Motor Exhaust

Removal of Nitrogen Oxides from Motor Exhaust 

ABSTRACT

The next step in the Automobile industry may not be the third generation hybrid vehicles but lies in the development of the existing Internal combustion engine technology by improving the efficiency of the engine with  less fuel consumption and reduction of the harmful exhaust gases making vehicles more Eco-friendly. Vehicles with lean-burning engines are therefore gaining ground. These engines work with excess air and can run on noticeably less fuel. This paper is a new approach in removing nitrogen oxides(NOx) from the exhaust of lean-burning motors.
The temporary storage of the, nitrogen oxides on an adsorbent surface plays a key role in this. Their storage medium is a Zeolite that is not sensitive to the sulphur-containing combustion products and are later reduced to environmentally friendly dinitrogens. Catalysts promoting reduction of NOx in a lean environment(LNC’s) which have shown promising results are Copper exchanged zeolite Cu/ZSM5, and Platinum on alumina Pt/Al2O3.